diff --git a/configure-box.sh b/configure-box.sh
index 59d0977..8d0c758 100755
--- a/configure-box.sh
+++ b/configure-box.sh
@@ -91,7 +91,7 @@ echo "Pulling Docker images"
 docker-compose pull
 
 echo "Adding tor password"
-SAVE_PASSWORD=`docker run getumbrel/tor:v0.4.1.9 --quiet --hash-password "${RPCPASS}"`
+SAVE_PASSWORD=$(docker run --rm getumbrel/tor:v0.4.1.9 --quiet --hash-password "${RPCPASS}")
 # Add a new line first
 echo >> tor/torrc
 echo "HashedControlPassword ${SAVE_PASSWORD}" >> tor/torrc